Mercury - 65 Amp Alternator Delco Serpentine Series Marine-Grade Construction 863077T. OverviewThere's a certain comfort that comes from knowing your electrical system is ready for whatever the day throws at you. Whether you're running the stereo at anchor, trimming the drive as you ease into a slip, or firing up your chartplotter before heading offshore, you expect your alternator to keep everything steady. With this Mercury Marine part, that confidence returns the moment your engine settles in